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@uitrit ttttz i gstwt @fitte IMPROVEMENT'IN STEAM-ENGINE AIR-PUMPS. l

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TO ALL WHOMLIT MAY CONCERN:` ,Y

Be it known that I, ANDREW HARTUPEE, of the city of Pittsburg, in the county of Allegheny, State of Pennsylvania, have invented an improved Device for Workingthe Air-Pumps of Steam Engines;a.nd I do I declare that the following is a. full, clear, and exact description of the same, reference being hndto the accompanying drawings, making part of this specification, in which. my improvement is represented 'in longitudinal..

section. i

My invention consists in a combina-tion of levers and pitman with the sliding-head, piston-rod, and slides of a, horizontal or inclined steam engine, by which I obtain two full strokes of thev air-pump or air-pumps for one strokerof the piston of the steam engine, )vhereby I am *able to make thenir-pump much smaller than it should be wereit to make but one stroke for every stroke of. the steam'engine. v

Y A is the framework of the engine, on which the cylinder B' is fastened g, C is the pillar-block; thecraii'k; E, the Pitman; G G are the slides; H is'the piston ;v I, thepiston-rod; K, the sliding-head; L, the p'niip'rockbeam; M', thersnpports forthe beam L; O O,'theiairpnmps'; P, the condenser; R R', the pump-pistons; r r', the pump-rods, and S is the link, which is jointed to the head K vand to the lever L, to give motion to that lever, as hereafter described. When thepiston is in, the head K-is atthe point U, andthe link S 4is in the position of the red line U V; when the piston is 'mid-cylinder, (as represented in the drawings the link S is in l the position from T to Z; and whenl the piston is ont, the head K is at the point W, and the link'S is in the position indicated by the red line W V, thus making tivo strokes of the pumps O Ol for one stroke ofthe piston H.

In horizontal or inclined stenm engincs,'the combination of the link S and lever L iviththe head K, pistonrod I, and slides G G, arranged as described and for the purpose specified.

' i' I., l ANDREW HARTUPEE, [L. s]

Witnesses:

'CAMILLE ADer, H. P. GENGEMBRE. 

